Device for detecting the presence of recorded information on a m

Details Device for detecting the presence of recorded information on a m Device for detecting the presence of recorded information on a m

1997-09-30

2000-02-15

Metjahic, Safet

Photography

Exposure data from film itself

396319, 396390, 360 18, G03B 1724, G11B 502

Patent

active

060262494

ABSTRACT:
A camera which includes a recording unit for recording photographic information in a record area on a magnetic layer of a photographic film for each exposed frame, and a regenerating unit for scanning the magnetic layer to determine the presence or absence of the recorded information. The regenerating unit includes a magnetic head for scanning the magnetic layer and generating a corresponding signal, an amplification circuit for amplifying the signal generated by the magnetic head, a smoothing circuit for obtaining an envelope waveformn, and a magnetic information detecting circuit for determining whether magnetic information is recorded in the magnetic record area for each frame on the photographic film by sampling the voltage level of the signals output from the smoothing circuit a plurality of times, integrating or averaging the sampled voltage levels, and comparing the integrated or averaged sampled voltage levels with a reference voltage. The magnetic head has a small number of coils sufficient for detecting the presence of recorded information, but insufficient for accurately reproducing the recorded information.

REFERENCES:
patent: 5130754 (1992-07-01), Cloutier et al.
patent: 5335029 (1994-08-01), Itoh et al.
patent: 5412444 (1995-05-01), Kazami
patent: 5434634 (1995-07-01), Yoshida
patent: 5649249 (1997-07-01), Yoshida
patent: 5727240 (1998-03-01), Mizumoto et al.
patent: 5729778 (1998-03-01), Sasaki
patent: 5760876 (1998-06-01), Farling et al.

Affiliated with

Also associated with

Rating

Device for detecting the presence of recorded information on a m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for detecting the presence of recorded information on a m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for detecting the presence of recorded information on a m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1912973